New creature idea (randomly encountered) instead of a Fae type / found anywhere you find Fae,. or replace other creatures of the same type and relevance.

Beer imp.
Town drunkard.
Giant floating beer barrel.
Beer demon.

etc.

If you slay one of these creatures, you gain 1 of the random buffs that drinking a beer would give you.
This could open up a new advantage that would increase the duration of such buffs, or increase the encounter chance.